Furnace.



I. W. FOLTZ FURNACE.

AvvucATuoN HLED MAR.6.1916.

1 ,274, 1 55. Patented July 30, 1918.

IBA. FOLTZ, 0F CHICAGO, ILLINOIS.

Specification of Letters Patent.

Patented July 3o, 191s.

` Application led Iarch 6, 1916. Serial 11' o. 82,414r.`

To all whom it may concern:

Be it lmown that I, Ina W. FoLTz, a citizen of the United 'States of America', and a resident of Chicago, county of Cook, and State of Illinois, have invented certain new and useful Improvements in Furnaces, of which the followin is a specification.

This invention re ates to furnace constructions and its object is mainly to provide improved means for mixing heated air in required proportions with the gases distilled from the burning fuel. i

. An illustrative embodiment of this invention is shown'in the accompanying drawings, in which- Figure 1 is a longitudinal vertical section on the line v1-1 of Fig. 2, of a furnace conl structed according to this invention.

Fig. 2 is a sectional plan View taken Von the line 2-2 of Fig. 1.A l

Fig. 3 is a transverse vertical section taken on the line 3 3 of Fig. 1

Fig. 4 is a detail in plan of grate.

It is well known that the gases generated by burnin ticularly te carbon contained in said gases, muay be completely burned if mixed with a s cient quantity of hot air, and ignited before said ases are permitted to cool to any apprecia le extent.

e present invention provides an improved means for heating, mixingand delivering air and' gases in a region of comparatively high heat inthe furnace. The invention also provides an air and gasmixing device which in no way interferes with the Stoking andy operation of the furnace, and may be-easily applied'to many standard makes of furnaces which ordinarily have little, if any, provision for completely consuming the gases distilled in such furnaces.

The drawings .show a standard type of furnace and boller Without alteration of the form of the fire-box and combustion chamber, or the grate and the supporting brick work. The boiler 1 surrounds theflues 2 and the fire-box lining 3. The fire-box is providedwith a grate 4 in the usual location supported by the grate'rests 5. The perforated conduit 6 is preferably located at each side o'f the grate and is open at its lower end to provide a passage for air from the ash-pit 7 into the sides ofthe fuel body on the grate. l

part of the coal and other fuels, and paroutlet 1 v vided with small Conduits 6 are preferablyprovided lwith 'perforated extensions 8 at the front of the furnace, as shown in Fig. 2. Communicating with' said conduits ,at each forward corner of. the furnace is an upstanding pipe or conduit 9,.which extends upwardly close to the roof 10 of the fire-box and then L'to the rear end .of the fire-box or into the combustion chamber, and returns to the forward end of the fire-box where itis provided with an outlet 11. The object of so arranging these conduits is to provide `for highly heating the air passing through the same before said air is delivered to the compartment or division 12 of the furnace where it is mixed with gases rising from the fuel.

Af approximately one-fourth the distance from the rear end of the fire-box is a transversely extending dividing wall 14 suitably deslgned to provlde space between the lower edge of the same and the grate 4,-this space being more or less closed up by. the fuel during ordinary operation of the furnace. The wall 14 is made hollow, providing av vertical passage 15 having a plurality of inlets 16 communicating lwith the divlsion or compartment 12 of the furnace, and an'.

conduits 9 are preferably provided, in addition to the outlets 11, with anoutlet 18 a communicating with the passage in the partition wall 14 and are also preferably proerforated pipes 19 communicatlng wlth t e compartment or diviv sion 20. he outlet into the partition wall 14 may be provided for by a pipe 21 connecting. the conduits 9.at therear of partition 1 4 and having an extension 22 entering the partition wall, 14. The: passage ofv air upwardly through the grate into division 20 maybe more or lessrestricted by closing some' of the apertures in the rear grate bars, as indicated in Fig. 4 by numeral 23. Accordingly, inthe operation of 'the furnace the lighter gases rising from the fuel will be mainly collected in the compartment 12 where they are mixed with heated air delivered into said compartment through Ithe outlets 11 in conduits 9. The mixture then passes under the arch orthrough inlets 16 into the hollow wall 14 where additional 'air is mixed therewith, which air is supplied at its lower edge. The air heating iiited when leaving the lower open edge 17 of said partition. The flame rising from said burning gases and extending into the fines 2 is provided with additional oxygen to insure complete combustion thereof by hot air which is delivered through the perforated pipes 19 in the compartment 20.

Although but one specific embodiment of this invention has been herein shown and described, it will be understood that numerous details of the construction shown may be altered or omitted without departing from the spirit of this invention as defined by the following claims.

I claim l. In a furnace, a furnace chamber comprising surrounding walls and a grateha transversely extending wall separating said furnace compartment into two divisions, said wall being located approximately onefourth the distancefrom the rear of said furnace chamber and arranged to close the upper part of said furnace chamber while providing communication between the two divisions of said chamber at the lower end of said wall, said wall being provided with a vertically extending passage open at its lower end and communicating above said lower end with the larger of said divisions of the furnace chamber, a conduit extending upwardly from the ash-pit and extending into the smaller of said divisions and from there leading into the larger of said divisions and havin an outlet for air in the larger of said divisions.

2. Ina furnace, a furnace chamber `coniprising surrounding walls 'and a grate, a transversely extending wall separatingsaid furnace compartment into two divisions, said wall being located approximately onefourth the vdistance from the rear of said furnace chamber and arranged to close the upper part of said furnace chamber while providing communication between the two divisions of said chamberat the lower end of said wall, said wall being provided with a vertically extending passage open at its lower end and communicating above said lower end with the larger of said divisions of the furnace chamber, a conduit extending upwardly from the ash-pit and extending into the smaller of said divisions and from there leading into the larger of said divisions and having outlets for air in the vertically extending passage of said dividing wall and in the larger of said divisions.

3. In a furnace, a furnace chamber comprising surroundin walls and a grate, a transversely extending wall separatin said furnace compartment into two divisions, said wall being located approximately onefourth the distance from the. rear of said furnace chamber and arranged to close the 'upper part of said furnace chamber while providing communication between the two divisions of said chamber at the lower end of said wall, said wall being provided with a vertically extending passage open at its lower end and communicating above said lower end with the larger of said divisions of the furnace chamber, a conduit extending upwardly from the ash-pit and extending into 'the smaller of said divisions and from there leading into the larger of said divisions and having outlets for air in the smaller of said divisions, in the vertically extending passage in said wall, and in the larger of said divisions.

4. A furnace, comprising a furnace chamber having surrounding walls and a grate, a transversely extending partition dividing said chamber into two unequal divisions, said partition being provided with a conduit to permit the passage of gases and air from the larger to the smaller of said divisions, a conduit extending from the ash-pit upwardly into the larger of said divisions and from this into the smaller of said divisions and returning into the larger of said divisions, said conduit having an outlet in the larger of said divisions.

5. A furnace, comprising a furnace chamber having surrounding walls and a grate, a transversely extending partition dividing said chamber into two unequal divisions, said partition being provided with a conduit to permit the passage of gases and air from the larger to the smaller of said divisions, a conduit extending from the ash-pit upwardly into the larger of said divisions and from this into the smaller of said divisions and returning into the larger of said divisions, said conduit having outlets in the passage in said partition and in the larger of said divisions.

6. A furnace, comprising a furnace chamber having surrounding walls and a grate,-a transversely extending partition dividing s aid chamber into two divisions, said partition being provided with a conduit to permit the passage of gases and air from one to the other of said divisions, a conduitextending upwardly from the ash-pit and extending into the rear one of said divisions and from there leading into the forward one of said divisions and having an outlet for air therein at the forward end of said forward division.

7 A furnace comprising surrounding walls, a grate van ash-pit, and a boiler, a transverse wall depending from the roof of the furnace and dividing it into two compartments but arranged to provide restricted communication between said compartments, and a conduit having an inlet in the ash-pit, said conduit extending upwardly into the forward compartment and then adjacent the boiler surface to the rear compartment of the furnace and returning also adjacent the boiler surface to the forward compartment, the conduit being provided with an outlet in the forward compartment of the furnace.

8. A furnace comprising surrounding walls, a grate, an ashpit and a boiler, a transverse Wall depending from the roof of the furnace and dividing it into two compertinents, said transverse Wall'being arranged to provide restricted communication l between said compartments and a conduit 10 having an inlet in the ashpit, said conduit having a portion of its length located in the rear compartment and being provided with an outlet in the forwardcompartment.

Signed at Chicago this 3d day of March, 15 1916.

IRA W. FOLTZ. 

